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Downstream speed = 360/10 = 36 km/hour Upstream speed = 360/15 = 24 km/hour So, speed of boatman in still water = (36 + 24)/2 = 30 km/hour Therefore, required time = 480/30 = 16 hours
Mr. P invested Rs. ‘4x’ in scheme ‘A’ offering simple interest of 25% p.a. and reinvested the interest earned from scheme ‘A’ at the end of ...
Simica invested a certain amount of money at a simple interest rate of 12.5% per annum and earned Rs. 2,400 as interest over 3 years. If Tabu invested t...
The difference of S.I and C.I on an amount of Rs. 40000 for 2 years is Rs. 64. What is the rate of interest?
Rohit invested a certain amount at the rate of 6 p.c.p.a. and obtained a simple interest of Rs 8,730 at the end of 3 years. What amount of compound inte...
Rina lent Rs. 18,000 to her brother at a compound interest rate of 'y%' per annum, compounded annually. After one year, her brother paid her Rs. 19,440 ...
Rs. 5000 when invested at simple interest of r% p.a. amounts to Rs. 7200 in 24 months. If the same sum had been invested for 1 year at compound interest...
A farmer wants to divide Rs 1,22,000 between his sons , who are 18 and 20 years old respectively, in such a way that the sum divided at the rate of 20% ...
The difference between the interest received on a certain sum at the rate of 35% p.a. and 30% p.a. respectively at simple interest for two years is Rs. ...
A man invested a certain amount of sum at 15% per annum simple interest and earned an interest of Rs.2100 after 2 years. If the same amount is invested ...
A certain sum of money invested at R% p.a. fetches a compound interest (compounded annually) of 1560 and simple interest of Rs.1500 at the end of 2 year...
